Ranaudo, 24, returns to the Red Sox for his second major league stint of the season. He started and earned the win for the Red Sox in his major league debut on August 1 against the Yankees at Fenway Park. Ranaudo held New York to two runs in 6.0 innings, allowing four hits and four walks while striking out two. The right-hander is 13-4 with a 2.58 ERA and a .215 opponent batting average in 22 starts this season for Pawtucket, ranking among International League leaders in wins (1st), ERA (2nd), opponent AVG (2nd), and WHIP (4th, 1.18). In 125.2 innings with the PawSox, he has fanned 104 batters compared to just 98 hits and 50 walks allowed. Signed as a supplemental round selection in the 2010 June Draft, he is 34-18 with a 3.47 ERA (166 ER/430.1 IP) and 375 strikeouts in 82 career minor league outings, including 81 starts.

Escobar, 22, did not make an appearance for the Red Sox after being recalled Sunday for his first career major league stint following Saturday night's 19-inning game in Anaheim. He returns to Pawtucket, where he has made two starts, posting a 1.50 ERA (2 ER/12.0 IP), with three walks, and 10 strikeouts with no record. The left-hander was acquired from the San Francisco Giants along with Heath Hembree in exchange for right-handed pitcher Jake Peavy and cash on July 26. Between the PawSox and Triple-A Fresno where he began this season, Escobar has gone 3-8 with a 4.76 ERA (65 ER/123.0 IP), 40 walks and 106 strikeouts in 22 starts. He entered this season as the No. 2 overall prospect in the Giants minor league system as rated by Baseball America.